If an atom is neutral, then the number of electrons is equal to the number of _______________________
What is the temperature of 0.80 mol of a gas stored in a 275 ml cylinder at 175 kpa? use p v equals n r t. and r equals 8.314 startfraction l times kilopascals over moles time k endfraction.. 4.6 k 7.2 k 61 k 96 k
The temperature of the ideal gas is 7.235 K.
Temperature of the ideal gasThe temperature of the ideal gas is calculated as follows;
PV = nRT
T = PV/nR
where;
P is pressure of the gasV is volume of the gasn is number of molesR is ideal gas constant = 8.314 L.kPa/mol.KT = (175 x 0.275) / (0.8 x 8.314)
T = 7.235 K
Thus, the temperature of the ideal gas is 7.235 K.
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Answer:
7.2 k
Explanation:
edge
What volume of nitrogen (n2) would be completely consumed in the reaction with 30.80 g of
hydrogen gas(h2)?
The answer is 285.33g nitrogen would be completely consumed in the reaction with 30.80 g of hydrogen gas.
What is a mole ?
A mole is defined as 6.02214076 × 10²³ atoms, molecules, ions, or other chemical units.
Write a balanced equation.
Calculate the moles of H₂ in 30.8 g.
Calculate the moles of N₂ required to react with H₂.
Calculate the mass of N₂.
Calculate the initial mass of N₂.
Start with a balanced equation.
N₂ + 3H₂ --> 2NH₃
Calculate the moles of H₂ in 30.8 g.
n = m/M; where n = moles, m = mass, and M = molar mass.
M(H₂) = 1.008 g/mol
n(H₂) = (30.8 g)/(1.008 g/mol) = 30.56 mol H₂
Calculate the moles of N₂ required to react with 30.56 mol H₂ , using the mole ratio between H₂ and N₂ in the balanced equation.
30.56 mol H₂ × 1 mol N₂/3 mol H₂ = 10.18 mol N₂
Calculate the mass of N₂ in 10.18 mol.
m = n × M
M(N₂) = 2 × 14.007 g/mol N = 28.014 g/mol N₂
m(N₂) = 10.18 mol × 28.014 g/mol = 285.33g N₂
Therefore 285.33g nitrogen would be completely consumed in the reaction with 30.80 g of hydrogen gas.
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An increase in carbon dioxide in the atmosphere is associated with an increase in global temperature. Which property of carbon dioxide is responsible for this temperature increase?
A. Carbon dioxide transmits more sunlight than other atmospheric gases.
B. Carbon dioxide efficiently turns sunlight into heat.
C. Carbon dioxide keeps heat in the atmosphere from escaping into space.
D. Carbon dioxide stores solar energy in chemical bonds.
Answer:
Pretty sure its C.
Explanation:
Carbon dioxide is known for trapping heat in the Earth's atmosphere so this makes sense.
Hope this helped!
Perform the following mathematical operation and then report the answer in scientific notation.
554.3x10^117 - 5044x10^116 =
If an incorrect number of significant figures is used, the problem will be marked wrong.
The result of 554.3x10^117 - 5044x10^116 in standard form is -4988.57 x10^116
What is standard form?The term standard form refers to a way in which mathematical notation is made much easier. It is always a number multiplied by 10 raised to a given power.
As such, the problem 554.3x10^117 - 5044x10^116 can be written as; 55.43x10^116 - 5044x10^116 = -4988.57 x10^116
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If a person drinks a lot of water, the water content of their blood will increase.
describe how the water content of their blood is regulated.
Explanation:
Less water is reabsobed into the blood.
if it is a low water blood the blood glucose level are regulated by the liver and pancreas
PLEASE HELP EATHER ANSWER ONE OR ALL OR HOW MANY YOU WANT
Describe the scientific method/process and list its steps.
Define speed and velocity
List the three Laws of Isaac Newton and provide an example for each law.
List the two types of waves.
What is electricity?
Discuss what is electromagnetism.
Explanation:
Speed is the rate of an object moving along a path, whereas velocity is the direction of motion
Electricity is the flow of electric charge
Answer:
Describe the scientific method/process and list its steps:
The scientific method consists of six steps:
1. Define purpose
2. Construct hypothesis
3. Test the hypothesis and collect data
4. Analyze data
5. Draw conclusion
6. Communicate results
But what is it?
The scientific method is a process with the help of which scientists try to investigate, verify, or construct an accurate and reliable version of any natural phenomena.
-
Define speed and velocity:
Speed is the quantitative measure of how quickly something is moving. Velocity defines the direction of the movement of the body or the object. Speed is primarily a scalar quantity. Velocity is essentially a vector quantity. It is the rate of change of distance.
List the three Laws of Isaac Newton and provide an example for each law.
1 - An object will remain at rest or in uniform motion in a straight line unless acted upon by an external force. It may be seen as a statement about inertia, that objects will remain in their state of motion unless a force acts to change the motion.
(example: A coin put on top of a paper on the table will stay in place when the paper is pulled.)
2 - That force is equal to the change in momentum per change in time. For a constant mass, force equals mass times acceleration, i.e. F = m*a.
(example: A truck which carries less mass will have a bigger acceleration that a truck which carries more mass)
3 - States that for every action there is an equal and opposite reaction.
(example: Our hand feels pain when we hit the table because the table gives force as a reaction to our hand)
List the two types of waves.
1. Mechanical Wave --> A mechanical wave is a wave that is an oscillation of matter and is responsible for the transfer of energy through a medium.
2. Electromagnetic Wave --> Electromagnetic waves are created by a fusion of electric and magnetic fields. The light you see, the colours around you are visible because of electromagnetic waves.
-
What is electricity?
Electricity is the flow of electrical power or charge.
-
Discuss what is electromagnetism.
Electromagnetism is a branch of physics that is about the electromagnetic force that is between electrically charged particles. Electromagnetism is the basic reason why the electrons are bound to the nucleus and responsible for the complete structure of the nucleus!
Maurels
5. Explain what happens
to the kinetic energy when
you tap the first domino in
a row of dominos?
Explanation:
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A tire at 21°c has a pressure of 0.82 atm. its temperature decreases to –3.5°c. if there is no volume change in the tire, what is the pressure after the temperature change? use startfraction p subscript 1 over t subscript 1 endfraction equals startfraction p subscript 2 over t subscript 2 endfraction.. 0.75 atm 0.89 atm 1.1 atm 1.3 atm
The pressure of the tyre after the temperature change is 0.89atm. Details about pressure can be found below.
How to calculate pressure?The pressure of the tyre can be calculated using the following equation:
P1/T1 = P2/T2
Where;
P1 = initial pressureP2 = final pressureT1 = initial temperatureT2 = final temperatureAccording to this question, a tyre at 21°C (294K) has a pressure of 0.82 atm. Its temperature decreases to –3.5°C (269.5K).
0.82 × 294 = P2 × 269.5
241.08 = 269.5P2
P2 = 241.08 ÷ 269.5
P2 = 0.895atm
Therefore, the pressure of the tyre after the temperature change is 0.89atm.
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Answer: 0.75 atm
Explanation: just did test on edge
How do the degrees of dissociation differ for strong acids and weak acids?.
In acidic solution, ________. In acidic solution, ________. [h3o ]= 0m [h3o ]=[oh−] [h3o ]>[oh−] [oh−]> 7. 00 [h3o ]<[oh−]
In acidic solution, [H₃O ] > [OH⁻]. The correct option is C.
What is hydronium and hydroxide ion?Hydronium ion is the simplest form of oxonium ion, and it is derived from the protonation of water. It is produced by dissolving the Arrhenius acid in water.
Hydroxide ion is a diatomic anion formed with oxygen and hydrogen with single covalent bond.
The concentration of hydronium ions in an acidic aqueous solution will be higher than the concentration of hydroxide (OH-) ions.
Thus, the correct option is C, [H₃O ] > [OH⁻].
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Which gas law should be used in the following problems: A sample of nitrogen (N2) has a volume of 50.0 L at a pressure of 760 mmHg. What is the volume of gas at a pressure of 1500 mmHg if there is no change in temperature
In a hydrogen bomb, hydrogen is converted into:
A) U-238
B) Helium
C) U-235
D) Barium
Answer:
helium ................
A 16. 0g sample of iron was heated from 16oc to 35oc, it absorbed 246. 4j of energy as heat. What is the specific heat of this piece of iron?
Answer: 0.81
Explanation:
These healthy fats are needed by your body that have 1 or more double bond
a). triglycerides
b). saturated
c). polysaccharides
d). unsaturated
Question 4 of 33
which of these is a pitfall associated with using oil?
a. acid mine drainage can pollute waterways.
b. shale rock deposits can release gas.
c. spilled oil can harm wildlife.
o d. fracking can cause earthquakes.
submit
Oils like petrol and diesel are fossil fuels. Using oil can be at a disadvantage as spilled oil can harm wildlife and the environment. Thus, option c is correct.
Why is oil harmful?Oil is a nonrenewable fossil fuel that can get depleted when used in excess. It is extracted by many processes through mining underwater and in fields. During these extraction processes, oil spills can occur.
Oil spills directly affect the environment and cause pollution of water and soil. This leakage affects the flora and the fauna that lives in the area and causes their death due to lack of oxygen.
Therefore, option c. oil spills cause harm to wildlife.
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Y'all, I need your help, these science questions are due tonight and I'm really stuck , please show work as well
Answer:
Explanation:
a) v=w*lambda
wavelength=5/2.5
wavelength=2m
b)342/320=1.06875m
c)342/1.5=228 Hz
d)4.6153=v/wave
The volume of a gas is 605 liters at 27.0°C. The new temperature is -3.0°C. What is the new volume? (Remember to convert temperatures to the Kelvin scale.) L
The volume of a gas is 605 liters at 27.0°C and the new temperature is -3.0°C, so the resultant volume of the sample is 544.53L.
What is the relation between volume and temperature?Relation between the volume and temperature of the sample of gas is represented by the ideal gas equation PV = nRT, and for the question required equation is:
V₁/T₁ = V₂/T₂, where
V₁ & T₁ are the initial volume and temperature of the gas.
V₂ & T₂ are the final volume and temperature of the gas.
On putting values from the question on the above equation and by converting temperature into Kelvin, we get
V₂ = (605)(270.15) / (300.15) = 544.53 L
Hence required volume of the sample is 544.53L.
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Which transfers thermal energy in the same way the Suns energy is transferred to Earth?
A. The boiling water
B. The burner flame
C. The hot candle
D. The rising steam
Answer: I think this one is the boiling water
sorry if wrong
Explanation:
1. The concentration of ammonium sulphate in soil can be determined by dissolving the salt and after filtering, adding acidified barium chloride to the solution. The insoluble barium sulphate (BaSO4) that forms is separated, dried and then weighed. In an experiment to determine the concentration of ammonium sulphate in soil, it was found that 1 kg of soil yielded 0.016 g of BaSO4. 1.) calculate the moles of BaSO4 in 0.116g
The number of mole present in 0.116 grams of barium sulphate, BaSO₄ is 0.0005 mole
Description of moleThe mole of a substance is related to it's mass and molar mass according to the following equation:
Mole = mass / molar mass
How to determine the mole of BaSO₄From the question given above, the following data were obtained:
Mass of BaSO₄ = 0.116 g gMolar mass of BaSO₄ = 137 + 32 + (16×4) = 233 g/mol Mole of BaSO₄ =?Mole = mass / molar mass
Mole of BaSO₄ = 0.116 / 233
Mole of BaSO₄ = 0.0005 mole
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Which statements differentiate DNA and RNA? Select three options.
A.) DNA is a double helix, and RNA is a single strand.
B.) DNA moves in and out of the nucleus, and RNA stays in the nucleus
C.) DNA is involved only in transcription, and RNA is involved in both transcription and translation.
D.) DNA is involved in both transcription and translation, and RNA is involved only in translation.
E.) DNA does not have uracil as a nitrogen base, but RNA does have uracil as a nitrogen base.
Have a LOVELY day
-Roxanne Wolf
Answer:
A.) DNA is a double helix, and RNA is a single strand.
C.) DNA is involved only in transcription, and RNA is involved in both transcription and translation.
E.) DNA does not have uracil as a nitrogen base, but RNA does have uracil as a nitrogen base.
Explanation:
Have a great rest of your day
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would a 0.48 m or a 1.48 m solution have a higher boiling point?
Answer:
1.48 m solution would have a higher boiling point
Explanation:
It is harder to boil larger bodies of water than it is to boil a small body of water. This is because there is more surface area in the small body of water than the bigger one.
As surface area increases, reaction time increases.
Reactions would become slower.
For the reaction of sodium bromide with chlorine gas
The reaction of sodium bromide with chlorine gas is Cl₂(aq) + 2Na + 2Br? 2Na + 2Cl⁻ + Br²(aq).
What is sodium bromide?Sodium bromide is an inorganic compound, white, crystalline with high melting point.
The reaction between halogens is redox reaction
Oxidation – 2Br⁻ ? Br₂ + 2e⁻ loss of electron.
Reduction – Cl₂ + 2e⁻ ? 2Cl⁻ gains of electron.
Thus, the correct option is Cl₂(aq) + 2Na + 2Br? 2Na + 2Cl⁻ + Br²(aq).
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ASAP PLEASEE
While many elements exist as a single atom, a few exist as molecules. Which 7 elements are diatomic?
Seven diatomic elements are H₂, Cl₂, N₂, F₂, Br₂, I₂ and O₂.
Which are diatomic molecules?Diatomic molecules are those molecules in which two atoms of same elements are present, and they are combined to attain the stability.
The seven diatomic molecules which are exist in the chemistry are:
Hydrogen gas (H₂)Chlorine gas (Cl₂)Nitrogen gas (N₂)Fluorine gas (F₂)Bromine gas (Br₂)Iodine gas (I₂)Oxygen gas (O₂)Hence H₂, Cl₂, N₂, F₂, Br₂, I₂ and O₂ are 7 diatomic molecules.
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How much energy is needed to change the temperature of 50g of water by 15°C?
Q=mcΔt
Q=50 x 4.186 x 15
Q = 3139.5 J
What is the vaccine ??
Answer:
a vaccine is a needle they give in your arm.
Explanation:
In order for a reaction to take place there must be sufficient energy, a significant number of collisions between molecules, and there must be a fraction of the collisions that have the correct molecular orientation. Which chemist said this?
Answer:
This theory(Collision theory) was proposed by Max Trautz and William Lewis.
Wetlands are able to remove nutrients and chemicals from water as the water flows through the area. A developer is planning to destroy most of the wetlands near a bay. In three to five sentences, explain how destroying the wetlands would impact the bay’s water quality and ecosystem.
Destroying the wetlands will reduce the bay's water quality and vegetation will not grow effectively near bay as a result of which ecosystem will also destroy.
What is ecosystem?All species and the physical environment with which they interact make up an ecosystem.
Nutrient cycles and energy flows bind these biotic and abiotic components together. Photosynthesis brings energy into the system, which is absorbed into plant tissue.As it is already mentioned that, water of the wetlands was carry nutrients which in turn was taken up by plants and vegetation, and if it will destroyed near a bay then the vegetation of that place will destroy as they will not get proper nutrients, which in turn also affects the ecosystem.
Hence destroying the wetlands will reduce the bay's water quality and vegetation will not grow effectively near bay as a result of which ecosystem will also destroy.
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Answer:
First The Answer
Destroying The Wetlands would drastically destroy the ecosystem and water quality in it.
Explanation:
Second. I ALSO go by the name Beanieboi! LOL One of us is an Imposter! (I hope not me, Because the full name is The Green-Haired Beanie Boi...
Anyhow...
THE BEANIE ARMY GROWS!!!!!!!
A frying pan is connected to a 110-volt circuit. If the resistance of the frying pan is 10 ohms, how many amperes does the frying pan draw?
Answer:
11 A
Explanation:
⇒ V = IR
⇒ 110 V = I * 10 Ω
⇒ I = 110/10
⇒ I = 11 A
The current flowing through the frying pan is equal to when 110 Volts are connected to the circuit.
What is Ohm's law?Ohm’s law can be described as the voltage difference across any conductor being directly proportional to the electric current passing through that conductor. Assuming temperature and other conditions remain constant.
Ohm’s law can be applied only if the temperature will be constant. Ohm’s S.I. unit is rho (Ω), and the electric current raises the temperature.
The mathematical expression of voltage difference provided by Ohm's law is:
V = IR
Where V is the voltage difference and R is the resistance and I the electric current flowing.
Given, the voltage difference of the circuit, V = 110 V
The resistance flowing through the circuit, R = 10 Ω
The electric current flowing through the frying pan can be calculated as:
I = V/R
I = 110/10
I = 11 A
Therefore, the electric current across the circuit is equal to 11 A.
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What is the change in enthalpy when 11. 0 g of liquid mercury is heated by 15°c?
Enthalpy change is the difference between energy used and energy gained. The change in enthalpy of the liquid mercury is 0.0231 kJ.
What is the enthalpy change?Enthalpy change is the difference between the energy used to break chemical bonds and the energy gained by the products formed in a chemical reaction.
The enthalpy change is given by,
[tex]\rm \Delta H_{rxn} = \rm q_{rxn}[/tex]
and,
[tex]\rm q = mc\Delta T[/tex]
Given,
Mass of the liquid mercury (m) = 11.0 gm
The specific heat of mercury (c) = 0.14 J per g per degree Celsius
Temperature change = 15 degrees Celsius
Enthalpy change is calculated as:
[tex]\begin{aligned} \rm q &= \rm mc\Delta T\\\\&= 11 \times 0.14 \times 15\\\\&= 23.1 \;\rm J\end{aligned}[/tex]
Therefore, 0.0231 kJ is the change in enthalpy.
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